Silencer for gaseous currents



Mai-ch 9, 1926.

STRAUSSLER SILENCER FOR GASEOUS CURRENTS Filed June 5, 1925 Patented I Mar. 9, 1926.

. UNITED STATES NICHOLAS STRAUSSLER, OF LONDON, ENGLAND.

' SILENGER FOR GASEOUS CURRENTS.

Application filed June 3,

T 0 all whom it may concern:

Be it known that I, NICHOLAS STRAUSSLER, a Rumanian subject, residing at 32 St. Swithins 'Lane, London, in the county of London, England, have invented certain new and useful Improvements in or Relating to' Silencers for Gaseous Currents, of which the following is a specification.

This invention relates to silencers for gaseous currents, such as are produced in the exhaust of internal combustion engines- Such a silencer as alread known comprised a transversely divisible silencer body or casing into which was fitted'a filling consisting of a permeable homogeneous mass of metal of a resilient character, such as very narrow and thin twisted strips of flexible metal enclosed in a reticulated metal bag, and tapered ribs were provided at the inlet end of the said body or casing to divert a portion of the incoming gases to the sides of the filling.

Accordin to the present invention the filling is e closed between two perforated paraboloidal, conical or similarl shaped steel shells or interior casings, w ich may be secured in sition by means of annular enlargements tting into sockets or recesses formed at the meeting ends of the sections of the silencer body or outer casing and dividing the latter into two chambers so that. the exhaust gases entering one of said chambers have to fix through the per-.

forated casings and ing to reach the other chamber. These pgrforated casin prevent the filling from ing compresse towards the silencer outlet by the impact of the entering gases. As the cross-sectional area .of the space between'the inner and outer casings is reduced from each end towards the middle of the silencer by reason of the curve or taper of the inner casing, the aforesaid ribs on the outer casin which were somewhat diflicult to keep 0 can, can be omitted, and the gases will enter the filling longitudinally and radially. The total area of the perforations in one inner casing may be larger. than the area ofthe inlet, so that a certam degree of carbon de osition will not choke the gas passages, an the perforations may be arranged in several circumferential rows in each sectionof the inner casing, in order to avoid any tendency of the gases to take an unduly short path through the The rows of i 1925. Serial No. 34,536.

perforations are preferably confined to the central part of each shell or inner casing, that is, a broad band of its surface adjacent to the socket is not perforated, and the nose of the shell is also imperforate. The inner casings can be readily withdrawnand separated from the filling.

In order that the said invention may be clearly understood and readily carried into effect, the same will now be described more fully with reference to the accompanying drawing, which represents in long tudinal section a silencer body, fitted with two conical shells or innercasings, one ofthe said conical shells being also represented in section.

A and B Eindicate respectively the two halves or sections of a divisible silencer body, secured together by a metal clip or band C which can be tightened by means of a bolt and wing-nut orthe like; D and E 'ndicate respectively the two shells or inner casings, and F the filling. The shells are perforated as shown at G, and have at their bases flanges or annular enlargements d, e fitting into the socket formed by. the flanged meeting ends of the sections A and B. The section A may have a projecting ferrule or reduced portion a which can be secured to the exhaust pipe of an internal combustion engine, and the section B can be detached when it is required to withdraw and replace the filling, which can be taken out along with one or both of the shells D, E.

What I claim and desire to secure by Lette'rs Patent of the United States is 1. A silencer comprising an outer casing transversely divisible intosections, the meeting portions of which sections form sockets, an inner casing also transversely divisible into two approximately conical shells each haying to fit into one of said sockets, each of said shells being perforated with a number of circumferentially arranged perforations located only in the part of said shell intermediate between its base and its a ex, and filling consisting of a permeable omogeneous mass of metal of a resilient characte enclosed within said inner casing.

2. A silencer comprising an outer casing having an inlet opemng and an outlet open-. filling Ina-- at its base an annular enlargement between the inlet and outlet openings, said inner casing having a substantially imperforate portion at one end which is adapted to deflect a fluid after it passes 'through the inlet opening so that it contacts with the wall, said wall bein perforated to permit the passage of the uid into the inner casing,and means arranged intermediate the ends of the inner casing for obstructing the space between the outer casing and the said wall of the inner casing to cause the fluid to pass into the inner casing before it passes throu h said outlet opening.

3. silencer comprising an outer casing having an inlet opening and an outlet opening, an inner casin' containing a-filling material mounted wit in the outer casing with a wall thereof spaced from the outer casin between the inlet and outlet openings, sai inner casing having a substantially imperforate portion at one end which is adapted I to deflect a fluid after it passes through the inlet opening so that it contacts with the wall, said wall being perforated to permit the passage of the fluidinto and out of the vinner casing, a substantially imperforate portion at the other end of the inner casing,

Q i and means for obstructing-the space between the outer casing and the said wall of'the imner casing at a point mtermediate of the wall, whereby the fluid is caused to pass into the inner casing on one side of the V015- struction and to v ass out of the inner casing at the other side of the obstruction.

4. A silencer comprising an outer casing having an inlet openlng and an outlet opening, an inner casing transversely divisible into two shells containing filling material and placed base to base, each of the shells having substantially imperforate portions at the remote ends thereof and being perforated along a side wall, said inner casing being spaced from the outer casing along the major portion thereof, and an obstruction adjacent the bases of the shells for causing a -fluid passing through the outer casing to enter the inner casing-through one ofthe shells and pass from the inner casing through the other shell.

5. A silencer comprising an outer casing having an inlet openmg and an outlet opening, an inner casing transversely divisible into two approximately conical perforated shells, having at their bases annular enlargements forming an obstruction adapted to engage the outer casing, the remainder of said shells being spacedfrom the outer cas-- ing and having substantially imperforate portions at .the apicesthereof, whereby a fluid passing through the outer casin -will enter the inner casing at one side of t e enlargements and pass therefrom at the other side of the enlar ments.

' NI .OLAS STRAUSSLER. 

